The Central Illinois Landmarks Foundation will celebrate National Historic Preservation Month and the 110th birthday of the GAR Hall at an Jazz event with Stephanie Aaron from 6 to 9 p.m. at the IVY Club, 5102 N. Galena Road, Peoria Heights. Admission is $35 per person and reservations are required by May 6. Reservation may be made by mail to PO Box 495, Peoria, IL 61651, or by calling 636-7022. Proceeds will go towards repairing the historic GAR Hall.